December 2024
A Mobile Transponder is an acoustic device typically mounted on a moving vehicle such as a Remotely Operated Vehicle (ROV), an Autonomous Underwater Vehicle (AUV), or other mobile subsea equipment. This device is primarily used for tracking the vehicle’s position and can integrate with Dynamic Positioning (DP) systems to support advanced functionalities like Target Follow or Follow-Sub.
The Minimum Power Heading is a function within the Auto Heading Select mode of a Dynamic Positioning (DP) system. It calculates and maintains the vessel's heading that minimizes the power required to counteract external forces such as wind, waves, and currents.
The Median Test is a quality control mechanism applied in Dynamic Positioning (DP) systems when three or more position reference systems (PRS) are in use. This test enhances the reliability of positional data by identifying and rejecting drifting or inaccurate PRS inputs through a voting algorithm.
A Mathematical Model is a key component within the Dynamic Positioning (DP) system software, representing the vessel's positioning characteristics through an advanced algorithm. This model integrates the vessel’s physical and dynamic properties, enabling the DP system to calculate the required thrust and directional adjustments to maintain position and heading.
Manual DP, commonly referred to as Joystick Mode, is a feature within Dynamic Positioning (DP) systems that allows operators to manually control the vessel’s position and heading using a single joystick. This mode offers a direct, operator-led approach to vessel maneuvering, particularly useful in scenarios requiring high precision or rapid response.
LUSBL (Long and Ultra-Short Baseline) is an advanced acoustic positioning system developed by Sonardyne, designed to enhance the accuracy and reliability of underwater positioning for dynamically positioned (DP) vessels. By integrating the principles of both Long Baseline (LBL) and Ultra-Short Baseline (USBL) systems, LUSBL offers superior performance in complex offshore operations.
Long Baseline (LBL) Hydroacoustic Position Reference is a precise underwater positioning system used in Dynamic Positioning (DP) and subsea operations. LBL systems rely on a network of calibrated transponders deployed on the seafloor, providing accurate range and position data to a vessel equipped with a hull-mounted interrogating transducer.
In the context of Dynamic Positioning (DP) systems, Latency refers to the delay between the generation of data by sensors or position reference systems and its use by the DP system for calculations. It is closely related to the concept of Age of Data, as both deal with the timeliness and relevance of incoming information.
The Kalman Filter is a mathematical algorithm widely used in Dynamic Positioning (DP) systems to generate precise position estimates by filtering incoming data signals. It plays a critical role in maintaining accuracy and stability by reducing the effects of noisy, intermittent, or unreliable data from position reference systems, sensors, and other inputs.
Joystick Mode, also referred to as Manual DP Mode, is a feature within a Dynamic Positioning (DP) system that allows an operator to control the vessel's position and heading using a single joystick. This mode combines manual precision with DP-assisted stability, providing flexibility in operations requiring fine control.
